features/bitrot: handle scrub states via state machine

    Backport of http://review.gluster.org/11149

A bunch of command line options for scrubber tempted the use of
state machine to track current state of scrubber under various
circumstances where the options could be in effect.

Change-Id: Id614bb2e6af30a90d2391ea31ae0a3edeb4e0d69
BUG: 1226666
Signed-off-by: Venky Shankar <vshankar@redhat.com>
Reviewed-on: http://review.gluster.org/11541
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/xlators/features/bit-rot/src/bitd/bit-rot-ssm.h b/xlators/features/bit-rot/src/bitd/bit-rot-ssm.h
new file mode 100644
index 00000000000..72fd62b3630
--- /dev/null
+++ b/xlators/features/bit-rot/src/bitd/bit-rot-ssm.h
@@ -0,0 +1,36 @@
+/*
+   Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#ifndef __BIT_ROT_SSM_H__
+#define __BIT_ROT_SSM_H__
+
+#include "xlator.h"
+
+typedef enum br_scrub_state {
+        BR_SCRUB_STATE_INACTIVE = 0,
+        BR_SCRUB_STATE_PENDING,
+        BR_SCRUB_STATE_ACTIVE,
+        BR_SCRUB_STATE_PAUSED,
+        BR_SCRUB_STATE_IPAUSED,
+        BR_SCRUB_STATE_STALLED,
+        BR_SCRUB_MAXSTATES,
+} br_scrub_state_t;
+
+typedef enum br_scrub_event {
+        BR_SCRUB_EVENT_SCHEDULE = 0,
+        BR_SCRUB_EVENT_PAUSE,
+        BR_SCRUB_MAXEVENTS,
+} br_scrub_event_t;
+
+struct br_child;
+
+int32_t br_scrub_state_machine (xlator_t *, struct br_child *);
+
+#endif /* __BIT_ROT_SSM_H__ */